Three officers from Sussex Police are flying to Gambia for investigations at the holiday home of a dead British man and other crime scenes in his murder.
Kate West has told police in Gambia that she killed her husband
The two detectives and a senior forensics officer have been asked to assist the Gambian police's inquiry into the death of William West.
Their role is expected to include taking DNA samples for analysis.
The burnt body of Mr West, 76, from Hastings, was found in a bag. His wife Kate, 26, has confessed to his murder.
"The basic investigations have been conducted," said Aziz Bojang, an assistant superintendent with the Gambian police.
He said the Sussex officers would be helping with "mop-up scientific investigations to strengthen whatever evidence is already gathered".
Mr West's charred remains were found near his holiday home
"We will try to show them how far we have gone.
"We will take them to places where the incident occurred and other places that are relevant to the investigation."
A spokeswoman for Sussex Police said the Gambian authorities were leading the case, and that the force would be able to contribute more advanced technology for investigating crimes.
Det Supt Chris Gillings, Det Insp Paul Phelps and a senior scenes of crime officer are travelling to Gambia on Tuesday for three days.
Mrs West has pleaded guilty at Brikama Magistrates' Court to her elderly husband's murder.
She had previously told police that she knocked him unconscious and set fire to his body.
Three other men have denied his murder.